FLUID CONTROL VALVE APPARATUS

摘要

A fluid control valve comprises a logic valve including a valve housing with a first valve member defined in the valve housing. An axially movable valve body is arranged in the first valve chamber, with the valve body including opposite end portions and a conical surface brought into contact with the conical surface when the valve body is moved in a valve closing direction. Two hydraulic fluid chambers are defined in the valve housing and communicate with each other when the conical surface portion is out of contact with the valve seat and out of communication when the conical surface portion contacts the valve seat. A first pilot chamber biases the valve body in a closing direction by a first pilot pressure signal. A second valve chamber is defined in the valve housing, with an extension of the valve body formed by extending the other end portion of the valve body.